ANSWER:
PLANE B SINCE THE VALUE OF THE COMPANY WILL GO UP BY $41.2768 MILLION.
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Plane A (For years 1 - 5):
NPV = -100 + 28 [(1+0.09)^5 - 1] / [0.09 * (1+0.09)^5]
NPV = -100 + 108.91
NPV = 8.91
Plane A (For years 6 - 10):
NPV in terms of value will be same since number of years and cash flow will be same. But that investment will be made at the end of year 5, and cash flows will begin in year 6 and end in year 10. So value of 8.91 will be in future, and made it in present value.
FV = PV (1+r)^n
8.91 = PV (1+0.09)^5
PV = 5.79
Total NPV of the Plane A = 8.91 + 5.79 = 14.70
Plane B
NPV = -132 + 27 [(1+0.09)^10 - 1] / [0.09 * (1+0.09)^10]
NPV = -132 + 173.2768
NPV = 41.2768
Therefore Plane B is better since the value of company will go up by $41.2768 Million.